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Finding the Fourth Proportional to 353,134.61, 487,323.34 and 191,989.65

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Solution

The fourth proportional to 353,134.61, 487,323.34 and 191,989.65 is: 264,944.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,134.61 : 487,323.34 = 191,989.65 : x
  2. Step 2: Convert to fraction form
    353,134.61/487,323.34 = 191,989.65/x
  3. Step 3: Cross multiply
    353,134.61x = 487,323.34 × 191,989.65
  4. Step 4: Simplify right side
    353,134.61x = 93,561,036,523.48
  5. Step 5: Solve for x
    x = 93,561,036,523.48/353,134.61
  6. Step 6: Final answer
    x = 264,944.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.